Ideally, the system would tell us whe to adapt human activities that are pushing an ecosysten toward a breakdown or would even allow us to pull an ecosvstem back from the borderline. Prevention is key scientists say, because once ecosystems pass their tipping point(临界点), it is remarkably...
methods in internal business practices or the marketplace. Innovation is believed to be the fundamental source of significant wealth generation within an economy. This belief is foundation of the current administration’s strategy for the economic recovery 2efforts to nourish the nation’s innovation ...
A. Uncontrolled human activities greatly upset ecosyslems. B. Rapid economic development threatens animal habitats. C. Species of commercial value dominate other species. D. Industrial activities help keep food wels stable.50. How does an early-warning sistem help us maintain the ccological balance...
The American landscape is urbanizing without full assessments of urbanization's true environmental costs and is endangering the delivery of critical ecosys... HA Sander - University of Minnesota. 被引量: 0发表: 2009年 The Kepler Data Archive at MAST: What`s in it for me? Hosted by MAST, ...
An investigation of the PPI based real exchange rate, Economic Systems 28, 383-403.Lommatzsch, K. and S. Tober (2002), "What Is behind the Real Appreciation of the Accession Countries' Currencies? An Investigation of the PPI-Based Real Exchange Rate", presented at "Exchange Rate ...
The approaches to studying the species in the ecosys-tems. D. The differences between weak and strong links in food webs.47. A strong link is found between two species when a predator C . A. has a wide food choice B. can easily find new prey C. sticks to one prey species D. can...
[1]. Broadly stated, it is the study of the role of agriculture in the world. Agroecology provides an interdisciplinary framework with which to study the activity of agriculture. In this framework, agriculture does not exist as an isolated entity, but as part of an ecology of contexts. ...
An ecosystem is made up of all living things and non-living things and how they interact with each other. Ecology is the study of how all these things interact with each other in order to survive. An ecosystc may be very small like a yard or a pool. Or it can be large like a ...
Economists have long argued that market-based environmental policy such as an environmental tax is beneficial to abate pollution emissions. This study aims at investigating the impact of carbon tax levy on carbon dioxide (CO2) abatement and industrial growth in China. To this end, the marginal aba...
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